symmetrical transducer

symmetrical transducer

[sə′me·trə·kəl tranz′dü·sər]
(electronics)
A transducer is symmetrical with respect to a specified pair of terminations when the interchange of that pair of terminations will not affect the transmission.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.